This study aimed to determine the effect of Augmented Reality media on the letter recognition ability of children aged 5–6 years at TK Negeri Pembina I Kota Pekanbaru. The study employed a quantitative approach with a pre-experimental method and a one-group pretest-posttest design. The participants were 20 children aged 5–6 years. Data were collected through observation using an instrument covering six indicators of letter recognition ability. The research consisted of a pretest, four treatment sessions using Augmented Reality media, and a posttest. Data were analyzed using prerequisite testing, a paired sample t-test, and N-Gain analysis with SPSS. The results showed that the mean score increased from 11.35 in the pretest to 18.80 in the posttest. The paired sample t-test produced a t-value of 31.729 with a significance value of 0.000, indicating a significant difference between the pretest and posttest results. The N-Gain score was 58.90%, categorized as moderate. Therefore, Augmented Reality media had an effect on the letter recognition ability of children aged 5–6 years at TK Negeri Pembina I Kota Pekanbaru
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